CN109854563A - A kind of pressure regulation pressure limiting combination overflow valve - Google Patents
A kind of pressure regulation pressure limiting combination overflow valve Download PDFInfo
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- CN109854563A CN109854563A CN201910164757.7A CN201910164757A CN109854563A CN 109854563 A CN109854563 A CN 109854563A CN 201910164757 A CN201910164757 A CN 201910164757A CN 109854563 A CN109854563 A CN 109854563A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/526—Pressure control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/56—Control of an upstream pressure
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The present invention discloses a kind of combination overflow valve with pressure regulation and pressure-limiting function, belong to Hydraulic Relief Valve technical field, including valve body, pressure regulator valve, pilot valve, pressure limiting valve and electromagnetism pop valve, the valve body has runner, spool assembly cavity, inlet I, liquid outlet I and liquid outlet II, the pressure regulation valve chamber side are connected to inlet I, and the other side is connect by runner with pilot valve, guide's valve chamber is connected to liquid outlet II, and guide's valve chamber is connected to by conduction hole with pressure regulator valve spring cavity；Adjusting bolt by rotation is the adjustable initial tension of spring for being applied to pilot valve；Pressure limiting valve is arranged in above pressure regulator valve, coaxial with pressure regulation valve chamber.Hydraulic coupling realizes balance inside and outside the utilization of pressure limiting valve main valve plug, once one end pressure release, pressure limiting valve main valve plug can open rapidly and pressure release, to guarantee the safety of system.Combination overflow valve of the invention is it is possible to prevente effectively from spool resonates, and automatic pressure control is abnormal, and valve body structure is rationally compact, and pressure regulator valve job stability is high.
Description
Technical field
The present invention relates to hydraulic control valve technical fields, and in particular to a kind of combination overflow with pressure regulation and pressure-limiting function
Valve belongs to a kind of high performance combination valve range.
Background technique
Overflow valve is indispensable one kind pressure-control valve in Hydraulic Power Transmission System, and three kinds are mainly played in hydraulic system
Effect.First is that pressure regulation mechanism, makes hydraulic system in constant pressure limit content efforts.Second is that pressure limiting mechanism, makes hydraulic system
To ensure safety no more than maximum pressure.Third is that backpressure mechanism, uses the buffer-braking etc. to hydraulic system as interior load.
Pressure regulation and pressure limiting are two mostly important functions of overflow valve, and all indispensable component part of most of hydraulic system.
When two overflow valves are used for Hydraulic Power Transmission System simultaneously, one is used for pressure regulation, another is used for pressure limiting, due to the control of the two
Differing pressure is closer, causes the spring rate of two overflow valves similar, is also easy to produce resonance to influence the normal of hydraulic system.
General solution is that two overflow valve installation sites are staggered in engineering, the disadvantage is that the size of hydraulic system is caused to increase.
It is therefore desirable to design a kind of combination overflow valve with pressure regulation and pressure-limiting function.
At present combining Two relief valve and forming combination valve all is simply to merge two valves, for realizing multistage
After pressure adjusting, pressure regulation the effects of pressure release, bidirectional pressure regulating, the resonance that main purpose is not primarily used for eliminating between two kinds is asked
Topic.A sequence is only arranged in triple-use valve used in most commonly seen coal mine hydraulic prop between overflow and pressure release
Relationship has no therebetween apparent cooperative mechanism, can not be used for Normal hydraulic system.Ju Long group Wuhu prosperity liquid
Pressure Co., Ltd proposes a kind of overflow relief valve (application number: 201610051737.5), for solving the quick of hydraulic support
Overflow does not have voltage regulation function, and the safety valve that the accurate title of the patent should be a kind of quick overflow is more accurate.Zoucheng City
The triumphant hydraulic Co., Ltd of moral of benefit propose a kind of bidirectional relief valve (application No. is: 201820164359.6) be able to achieve both direction
Positive-negative voltage-regulation effect, is the simple superposition of two overflow valves.
Applicant applied for a patent in 2015, has substantially carried out and has quickly opened when overflow valve is more than its metered flow
The function of safety valve, but safety valve is not implemented and helps its voltage stabilizing function in overflow valve normal work.Simultaneously the patent there is also
Following disadvantage: 1) valve flowing channel design is tortuous, and difficulty of processing is big, and process is cumbersome；2) there is processing hole inside main valve plug, this part
Hole is not easy to be processed；3) main valve, pilot valve and safety valve parallel arrangement, valve volume are larger；4) emergency procedures and reality of embodiment 1
The security process for applying example 2 is promptly sold using manual rotation, and to start emergency procedures and security process, there may be people for this process
For error；5) safety valve and main valve are arranged in parallel, and safety valve does not play help to the Rapid Stability of main valve.
In view of this, the main object of the present invention is: realize pressure regulator valve and pressure limiting valve collaborative work (when pressure regulation, pressure limiting
Valve helps its quick pressure stabilizing；When pressure limiting, pressure regulator valve helps its quick pressure releasing), at the same advanced optimize the combination valve structure and
Performance.
Summary of the invention
In view of the deficiencies of the prior art, the present invention discloses a kind of combination overflow valve with pressure regulation and pressure-limiting function, can
Resonance problem when Two relief valve coexists is solved, and constructs cooperative mechanism between the two, especially pressure limiting valve assists to adjust
Thus the mechanism of pressure valve steady operation further promotes its pressure regulation, pressure limiting performance.
In order to achieve the above object, the present invention is achieved by the following technical programs: one kind having pressure regulation and pressure-limiting function
Combination overflow valve, including valve body, pressure regulator valve, pilot valve, pressure limiting valve and electromagnetism pop valve, the valve body has runner, valve
Core assembly cavity, inlet I, liquid outlet I, liquid outlet II, it is characterised in that: pressure regulation valve chamber side is connected to inlet I, and the other side is logical
It crosses runner to connect with pilot valve, pilot valve is connected to liquid outlet II, and guide's valve chamber is connected to by runner with pressure regulator valve spring cavity；It is logical
It crosses rotation and adjusts the i.e. adjustable initial tension of spring for being applied to pilot valve of bolt；Pressure limiting valve is arranged in above pressure regulator valve, with pressure regulation
Valve chamber is coaxial；Pressure limiting valve is connected to by runner with liquid outlet II, and damping hole II, pressure limiting valve main valve plug are provided on pressure limiting valve main valve plug
Hydraulic coupling realizes balance inside and outside utilization, once one end pressure release, pressure limiting valve main valve plug can open rapidly and pressure release, to guarantee to be
The safety and stability of system.
Preferred: the pressure regulator valve main valve plug has poppet valve core, extension bar, damping hole I and annular groove, the damping hole I
It is located on the flange of pressure regulator valve main valve plug two sides, it is symmetrical about pressure regulator valve main valve plug center line；The annular groove is in extension bar
On.
Preferred: the flange and extension bar, flange underside area are A1, area is A on the upside of flange2, extension bar end area
A3, A1With A2+A3It is approximately equal, p when static balance1A1=p2A2+p3A3, act on the hydraulic power F=p for lengthening rod end3A3, can support
Disappear the fluctuation of pressure regulator valve main valve plug part.
Preferred: the pressure regulator valve main valve plug is axially arranged with liquid outlet I, and the poppet valve core is inserted far from inlet I, one end
Enter the liquid outlet I, and can be slided in I axial direction of liquid outlet.
Preferred: there is the pilot valve pre-tightening mechanism to include guide's spring and pre-tighten for applying to guide's spring
Power, the adjusting bolt that position can be adjusted axially along valve body.
Preferred: the pressure limiting valve includes pressure limiting spring and pressure limiting valve main valve plug, and the pressure limiting spring one end connects with valve body
Touching, the other end are connect with pressure limiting valve main valve plug；The pressure limiting valve main valve plug has damping hole II.
Preferred: the diameter of the pressure regulator valve feed liquor runner mouth is less than the diameter of pressure limiting valve feed liquor runner mouth.
Preferred: the pressure regulator valve main valve plug is mounted in valve body, the valve body have with outside pressure regulator valve main valve plug
The assembly cavity that shape matches.
Preferred: the combination overflow valve has electromagnetism pop valve, and the setting of electromagnetism pop valve is in pressure limiting valve chamber and liquid out
On runner between mouth II.
Including the combination of existing Two relief valve and patent (a kind of overflow with pressure regulation and security function referred to herein
Valve, application number: 201510898227.7) compared with prior art, the beneficial effects of the present invention are:
1) effectively spool is avoided to resonate.Pressure regulator valve main valve plug spring and pressure limiting valve main valve plug spring modulus are smaller, first
Pilot valve valve core spring elasticity modulus is larger, effectively avoids traditional Two relief valve control pressure close and spool is caused to resonate.
2) structurally reasonable compact.Due to pressure regulator valve, pressure limiting valve, pilot valve coexistence one, pilot valve and pressure limiting valve parallel
Cloth is arranged on the left of pressure regulator valve main valve plug and upside, intermediate to be connected to by runner, shares an inlet, makes structure more
It is rationally compact.
3) automatic pressure control is abnormal.It combines overflow valve and is equipped with electromagnetism pop valve, it is tight can in case of emergency to start electromagnetism
For anxious valve to guarantee system pressure safety, promptly selling compared to manual rotation reduces manual operation error, reaches safer, fast
Speed accurately starts pop valve, carries out pressure release, systems stabilisation pressure, to guarantee the safety and stability of system pressure.
4) pressure regulation stability is high.The both ends of pressure regulator valve main valve plug are acted on using the pressure of identical pulsating quantity or undulate quantity,
The stability for improving pressure regulator valve main valve plug, reduces the flow attack of pilot valve, to improve pressure regulation stability.Pressure regulator valve
Main valve plug two sides flange underside area is A1, flange upside area is A2, extension bar end area is A3, there are following equilibrium relations:
A1>A2And A1=A2+A3, pressure limiting valve intracavity liquid is applied to pressure regulator valve main valve plug extension bar end area A3Hydraulic coupling can help
The steady-state performance for improving pressure regulator valve main valve plug and the fast and stable in adjusting pressuring valve core work.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is 1 main view of the embodiment of the present invention；
Fig. 2 is the cross-sectional view in Fig. 1 at A-A；
Fig. 3 is the cross-sectional view in Fig. 1 at B-B；
Fig. 4 is the cross-sectional view in Fig. 1 at C-C；
Fig. 5 is 1 top view of inventive embodiments；
Fig. 6 is the cross-sectional view in Fig. 5 at D-D；
The state diagram of overflow valve when Fig. 7 is 1 pressure limiting process of embodiment；
Fig. 8 is the partial enlarged view in Fig. 7 at Q；
Fig. 9 is the valve body perspective view of embodiment 1；
Figure 10 is pressure regulator valve main valve plug cross-sectional view；
Figure 11 is pressure figure suffered by pressure regulator valve main valve plug；
Figure 12 is pressure regulator valve main valve plug perspective view；
Figure 13 is the top view of embodiment 2；
Figure 14 is the cross-sectional view in Figure 13 at E-E；
Figure 15 is the main view of embodiment 2；
Figure 16 is the cross-sectional view in Figure 15 at F-F；
1, valve body in figure, 2, pressure regulator valve, 3, pilot valve, 4, pressure limiting valve, 5, electromagnetism pop valve, 11, inlet I, 12, runner
I, 13, liquid outlet I, 14, runner II, 15, runner III, 16, runner IV, 17, liquid outlet II, 18, runner V, 121, oil pocket,
122, inlet II, 123, liquid outlet III, 21, pressure regulator valve main valve plug, 22, pressure spring, 23, damping hole I, 24, annular groove,
31, pilot valve, 32, guide's spring, 33, adjusting bolt, 41, pressure limiting valve main valve plug, 42, damping hole II, 43, pressure limiting spring,
44, screw plug, 51, electromagnetic valve core, 52, magnetic valve spring.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people exists
Every other implementation column obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 6 and Figure 11, one kind described in the embodiment of the present invention has pressure regulation and pressure-limiting function
Combination overflow valve, there are five parts to form altogether: valve body 1, pressure regulator valve 2, pilot valve 3, pressure limiting valve 4 and electromagnetism pop valve 5 form,
2 side of pressure regulator valve is connected to inlet I, and the other side is connect by runner II with pilot valve 3, and pilot valve 3 is connected to liquid outlet II, first
Pilot valve chamber is connected to by runner with pressure regulator valve spring cavity；Adjusting bolt by rotation is the adjustable spring for being applied to pilot valve 3
Pretightning force；Pressure limiting valve 4 is arranged in 2 top of pressure regulator valve, coaxial with pressure regulator valve main valve chamber；Pressure limiting valve 4 passes through runner and liquid outlet II
It is connected to, damping hole II is provided on pressure limiting valve main valve plug, hydraulic coupling realizes balance inside and outside the utilization of pressure limiting valve main valve plug.It can divide
For pressure regulation process, three courses of work of pressure limiting process and emergency decompression process.
The working principle of pressure regulation process:
1. pressure opens the last stage from zero-pressure to pilot valve.
Fluid divides two-way after flowing into valve body 1 from inlet I 11, enters 21 flange cavity of resorption of pressure regulator valve main valve plug all the way, is formed
Pressure p1, p1Act on 21 flange underside of pressure regulator valve main valve plug, active area A1；Then fluid enters pressure regulation through damping hole I 23
21 flange epicoele of valve main valve plug forms pressure p2, p2It acts on the upside of 21 flange of pressure regulator valve main valve plug, active area A2.It is another
Road fluid enters pressure valve spring chamber through damping hole II 42, forms pressure p3, pressure is lower at initial stage inlet I 11, this
When pressure limiting valve do not open, fluid remains static, and static pressure, pressure limiting valve main valve plug 41 are formed inside and outside pressure limiting valve main valve plug 41
It is remained turned-off under the action of static pressure and pressure limiting spring 43, the intracavitary pressure p of pressure valve spring3, p3Act on pressure regulator valve main valve plug 21
Lengthen rod end, active area A3.Pressure is lower at initial stage inlet I 11, intracavitary stream on 21 flange of pressure regulator valve main valve plug
Body acts in pilot valve 31 through runner II 14, and the hydraulic coupling acted in pilot valve 31 at this time is less than guide's spring 32
Specified pressure, pilot valve 31 remain off under spring force, at this time two above and below 21 flange of pressure regulator valve main valve plug
Side liquid is hydrostatic(al), therefore static pressure p2=p3.Pressure regulator valve main valve plug 21 is in hydraulic coupling F=p3A3, pressure spring power FtAnd self weight
Under the action of remain off, liquid outlet I 13 is not opened.
The balance of pressure regulator valve main valve plug 21 is different from common pilot operated compound relief valve, such as Fig. 6, Figure 11 and Figure 12 pressure regulator valve master
Spool flange underside area is A1, static pressure p1, flange underside area is A2, static pressure p2, the lengthening of pressure regulator valve main valve plug
Rod end area is A3, static pressure p3, pressure regulator valve main valve plug is by 3 end face fluid pressure p1A1、p2A2、p3A3And pressure spring
Power FtEffect, static balancing equation are as follows: p1A1=p2A2+p3A3+Ft.Due to end face A3On hydraulic p3With import pressure p1Tool
Have identical fluctuation pattern, can partial offset inlet pressure fluctuation, promoted pressure regulation pressure limiting combination overflow valve voltage regulation performance.
The stage after 2. pilot valve is opened.
When I 11 pressure of inlet increases, Fluid pressure is greater than 3 spring finger of pilot valve on the upside of 21 flange of pressure regulator valve main valve plug
Constant-pressure and be less than pressure limiting pressure when, pilot valve 31 overcomes under action of hydraulic force 32 specified pressure of guide's spring and is opened,
Side liquid enters pilot valve spring cavity, pressure regulator valve spring cavity and liquid outlet II 17 through runner 14 and flows on 21 flange of pressure regulator valve main valve plug
Enter fuel tank, at this point, on pressure regulator valve main valve plug 21 under the inhibition of damping hole I 23, effluent on 21 flange of pressure regulator valve main valve plug
Body pressure p2Reduce and is lower than flange underside fluid pressure p1, two sides form pressure difference Δ p to 21 flange of pressure regulator valve main valve plug up and down,
Pressure regulator valve main valve plug 21 can overcome pressure regulator valve main valve plug to lengthen rod end hydraulic coupling F=p under the action of pressure difference Δ p3A3, pressure regulation
Spring force FtWith self weight and open, liquid outlet I 13 open, fluid from liquid outlet I 13 flow into fuel tank, realize pressure regulation mechanism.At this time
21 aperture of pressure regulator valve main valve plug is smaller, and pressure regulator valve main valve plug extension bar annular groove 24 does not form channel, pressure valve spring with valve body 1
Chamber is not connected to pressure regulator valve spring cavity.In this stage, no matter how how inlet pressure is fluctuated, and pressure regulator valve main valve plug 21 can lead to
Excess pressure difference adjusts valve port opening, and then maintains the stabilization of outlet pressure, due to end face A3On hydraulic p3With pressure regulator valve main valve
Core flange underside pressure p1Fluctuation pattern having the same, can partial offset inlet pressure fluctuation, promoted pressure regulator valve main valve plug
Stability.
Pressure limiting process: when I 11 pressure of inlet reaches pressure limiting valve specified pressure, pressure regulator valve main valve plug 21 is in liquid at this time
Pressure regulator valve main valve plug is overcome to lengthen rod end hydraulic coupling F=p under the action of pressure3A3, pressure spring power FtIt is moved to most with self weight
Upper end, annular groove 24 and valve body 1 on 21 extension bar of pressure regulator valve main valve plug form channel, make pressure valve spring chamber and pressure regulator valve bullet
The connection of spring chamber, fluid enters pressure regulator valve spring cavity through annular groove 24 in pressure valve spring chamber, then after flowing to pilot valve spring cavity
Fuel tank is flowed out to by liquid outlet II 17, on pressure limiting valve main valve plug 41 under the inhibition of damping hole II 42, pressure limiting valve main valve plug
41 fluid inside pressure p3Reduction is reduced to low pressure and is lower than fluid pressure p at 41 inlet I 11 of pressure limiting valve main valve plug1, pressure limiting valve master
Pressure difference is formed inside and outside spool 41, pressure limiting valve main valve plug 41 can overcome pressure limiting spring force F under the action of pressure differencet1And
It opens, 41 entrance fluid of pressure limiting valve main valve plug flows into fuel tank, limit by liquid outlet II 17 after runner III 15 flows into guide's valve chamber
The rapid unlatching and pressure release of pressure valve main valve plug 41, ensure that the safety and stability of system, realize pressure limiting mechanism.
Emergency decompression process: when system inlet pressures are excessive to be exceeded overflow valve pressure release range or be in an emergency, electricity
Magnetic pop valve 5 can start, and be connected to pressure valve spring chamber and the runner of liquid outlet II 17, pressure valve spring cavity fluid is through flowing
Road flows into fuel tank, on pressure limiting valve main valve plug 41 under the inhibition of damping hole II 42, pressure limiting valve main valve plug by liquid outlet II 17
41 fluid inside pressure p3Reduction is reduced to low pressure and is lower than fluid pressure p at 41 inlet I 11 of pressure limiting valve main valve plug1, pressure limiting valve master
Pressure difference is formed inside and outside spool 41, pressure limiting valve main valve plug 41 can overcome pressure limiting spring force F under the action of pressure differencet1And it opens
It opens, pressure limiting valve main valve plug inlet fluid flows into fuel tank by liquid outlet II 17 after runner III 15 flows into guide's valve chamber, reaches quick
The purpose of pressure release, it is therefore prevented that the phenomenon that combination overflow valve system pressure constantly increases, to have the function that promptly to protect,
And then preferably protect the safety and stability of overflow valve.
Embodiment 2
Fig. 6 and Figure 13 is two kinds of overflow valve pressure-limiting function different implementation patterns of pressure regulation pressure limiting combination, basic ideas respectively
It is identical, is all the unlatching for controlling pressure limiting valve by the displacement in pressure regulator valve main valve plug.
It is a kind of with pressure regulation and pressure-limiting function described in the embodiment of the present invention as shown in Figure 11, Figure 13, Figure 14 and Figure 15
Overflow valve is combined, there are five parts to form altogether: valve body, pressure regulator valve, pilot valve, pressure limiting valve and electromagnetism pop valve composition, pressure limiting valve
Main valve plug 41 is arranged vertically with pressure regulator valve main valve plug 21, and valve body is equipped with inlet I 11, inlet II 122 and liquid outlet I 13, goes out
Liquid mouth II 17, liquid outlet III 123, electromagnetism pop valve 5 are located between oil pocket 121 and liquid outlet III 123.Pilot valve 3 is connected to out liquid
Mouth II 17, pressure limiting valve 4 are connected to liquid outlet III 123.It can be divided into pressure regulation process, three works of pressure limiting process and emergency decompression process
Make process.
Pressure regulation process working principle:
1. pressure opens the last stage from zero-pressure to pilot valve.
Fluid enters 21 flange cavity of resorption of pressure regulator valve main valve plug from inlet I 11, forms pressure p1, p1Act on pressure regulator valve master
21 flange underside of spool, active area A1；Then fluid enters 21 flange epicoele of pressure regulator valve main valve plug, shape through damping hole I 23
At pressure p2, p2It acts on the upside of 21 flange of pressure regulator valve main valve plug, active area A2.Fluid is from inlet II 122 through damping hole
II 42 enter pressure limiting valve chamber, form pressure p3, pressure is lower at initial stage inlet II 122, and pressure limiting valve is not opened at this time, stream
Body remains static, and static pressure is formed inside and outside pressure limiting valve main valve plug 41, pressure limiting valve main valve plug 41 is in static pressure and pressure limiting spring
It is remained turned-off under the action of 43, the intracavitary pressure p of pressure valve spring3, p3It acts on pressure regulator valve main valve plug 21 and lengthens rod end, acting surface
Product is A3.Pressure is lower at initial stage inlet I 11, and cavity fluid is acted on through runner II 14 on 21 flange of pressure regulator valve main valve plug
In pilot valve 31, the Fluid pressure acted in pilot valve 31 at this time is less than 32 specified pressure of guide's spring, pilot valve
Core 31 remains off under spring force, and two side liquids are hydrostatic(al) to 21 flange of pressure regulator valve main valve plug up and down at this time,
Therefore static pressure p2=p3.Pressure regulator valve main valve plug 21 lengthens rod end hydraulic coupling F=p in pressure regulator valve main valve plug 213A3, pressure spring power Ft
It is remained off under the action of self weight, liquid outlet I 13 is not opened.
The balance of pressure regulator valve main valve plug 21 is different from common pilot operated compound relief valve, such as Fig. 6, Figure 11 and Figure 12 pressure regulator valve master
Spool flange underside area is A1, static pressure p1, flange underside area is A2, static pressure p2, pressure regulator valve main valve plug extension bar
End area is A3, static pressure p3, pressure regulator valve main valve plug is by 3 end face fluid pressure p1A1、p2A2、p3A3With pressure spring power
FtEffect, static balancing equation are as follows: p1A1=p2A2+p3A3+Ft.Due to end face A3On hydraulic p3With import pressure p1Tool
Have identical fluctuation pattern, can partial offset inlet pressure fluctuation, promoted pressure regulation pressure limiting combination overflow valve voltage regulation performance.
The stage after 2. pilot valve is opened.
When I 11 pressure of inlet increases, Fluid pressure is opened greater than pilot valve 3 on the upside of 21 flange of pressure regulator valve main valve plug
Pressure and be less than pressure limiting pressure when, pilot valve 31 is opened under action of hydraulic force, on runner 14 and pressure regulator valve main valve plug flange
Fluid flows into fuel tank, on pressure regulator valve main valve plug 21 under the inhibition of damping hole I 23, pressure regulator valve master by liquid outlet II 17 in side
Fluid pressure p on the upside of 21 flange of spool2Reduce and is lower than flange underside fluid pressure p1, 21 flange of pressure regulator valve main valve plug upper and lower two
Side forms pressure difference Δ p, and pressure regulator valve main valve plug 21 can overcome 21 extension bar of pressure regulator valve main valve plug under the action of pressure difference Δ p
Hold hydraulic coupling F=p3A3, pressure spring power FtLiquid outlet I 13 is opened in effect with self weight, and fluid flows into fuel tank from liquid outlet I 13,
Realize pressure regulation mechanism.21 aperture of pressure regulator valve main valve plug is smaller at this time, on 21 extension bar of pressure regulator valve main valve plug annular groove 24 not with valve
Body 1 forms channel, and oil pocket 121 is not connected to pressure regulator valve spring cavity.In this stage, no matter how how inlet pressure is fluctuated, pressure regulator valve
Main valve plug 21 can adjust valve port opening by pressure difference, and then maintain the stabilization of outlet pressure.
Pressure limiting process: when inlet pressure is greater than pressure limiting pressure, pressure regulator valve main valve plug 21 moves to highest point at this time, adjusts
Annular groove 24 and valve body 1 on 21 extension bar of pressure valve main valve plug form channel, and fluid enters pressure regulation through annular groove 24 in oil pocket 121
After valve spring chamber through runner 18 by liquid outlet II 17 flow into fuel tank, at this time on pressure limiting valve main valve plug 41 damping hole II 42 obstruction
Under effect, 41 fluid inside pressure p of pressure limiting valve main valve plug3Reduction is reduced to low pressure and is lower than 41 inlet II of pressure limiting valve main valve plug
Fluid pressure p at 1221, pressure difference is formed inside and outside pressure limiting valve main valve plug 41, pressure limiting valve main valve plug 41 can be in the work of pressure difference
Pressure limiting spring force F is overcome undert1And open, the fluid of inlet II 122 is quickly flowed out through liquid outlet III 123, pressure limiting valve main valve
The rapid unlatching and pressure release of core 41, ensure that the safety and stability of system, realize pressure limiting mechanism.
Emergency decompression process:, can when system inlet pressures are excessive to be exceeded overflow valve pressure release range or be in an emergency
Electromagnetism pop valve 5 is opened, keeps the runner between oil pocket 121 and liquid outlet III 123 open-minded, makes oil pocket 121 and pressure valve spring chamber
Interior fluid flows into fuel tank by liquid outlet III 123, at this time on pressure limiting valve main valve plug 41 under the inhibition of damping hole II 42, limit
41 fluid inside pressure p of pressure valve main valve plug3Reduction is reduced to low pressure and is lower than fluid pressure at 41 inlet II 122 of pressure limiting valve main valve plug
Strong p1, pressure difference is formed inside and outside pressure limiting valve main valve plug 41, pressure limiting valve main valve plug 41 can overcome limit under the action of pressure difference
Pressing spring power Ft1And open, the fluid of inlet II 122 is quickly flowed out through liquid outlet III 123, achievees the purpose that quick pressure releasing, is prevented
Stop the phenomenon that overflow valve system pressure constantly increases, and then preferably protects the safety and stability of overflow valve system.
Claims (9)
1. a kind of combination overflow valve with pressure regulation and pressure-limiting function, including valve body (1), pressure regulator valve (2), pilot valve (3), pressure limiting
Valve (4) and electromagnetism pop valve (5), the valve body (1) have runner, spool assembly cavity, inlet I (11), liquid outlet I
(13), liquid outlet II (17), it is characterised in that: pressure regulator valve (2) side is connected to inlet I (11), and the other side passes through runner II
(14) it is connect with pilot valve (3), pilot valve (3) is connected to liquid outlet II (17), and guide's valve chamber passes through runner and pressure regulation valve spring
Chamber connection；Bolt (33) i.e. adjustable initial tension of spring for being applied to pilot valve (3) is adjusted by rotation；Pressure limiting valve (4) arrangement
It is coaxial with pressure regulator valve main valve chamber above pressure regulator valve (2)；Pressure limiting valve is connected to by runner with liquid outlet II (17), pressure limiting valve master
Damping hole II (42) is provided on spool (41), hydraulic coupling realizes balance inside and outside pressure limiting valve main valve plug (41) utilization.
2. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 1, it is characterised in that: the tune
Pressure valve main valve plug (21) has poppet valve core, flange, extension bar, damping hole I (23) and annular groove (24), the damping hole I (23)
It is located on the flange of pressure regulator valve main valve plug (21) two sides, it is symmetrical about pressure regulator valve main valve plug (21) center line；The annular groove
(24) on extension bar.
3. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 2, it is characterised in that: described convex
Edge and extension bar, flange underside area are A1, area is A on the upside of flange2, extension bar end area A3, A1With A2+A3It is approximately equal,
P when static balance1A1=p2A2+p3A3, act on the hydraulic power F=p for lengthening rod end3A3, pressure regulator valve main valve plug subwave can be offset
It is dynamic.
4. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 2, it is characterised in that: the tune
Pressure valve main valve plug (21) is axially arranged with liquid outlet I (13), and the poppet valve core is inserted into described far from inlet I (11), one end
Liquid outlet I (13), and can be slided in liquid outlet I (13) axial direction.
5. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 1, it is characterised in that: the elder generation
Pilot valve (3) have pre-tightening mechanism include guide's spring (32) and for guide's spring (32) apply pretightning force, can be along valve body
(1) it is adjusted axially the adjusting bolt (33) of position.
6. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 1, it is characterised in that: the limit
Pressure valve (4) includes pressure limiting spring (43) and pressure limiting valve main valve plug (41), and described pressure limiting spring (43) one end is contacted with valve body (1),
The other end is connect with pressure limiting valve main valve plug (41)；The pressure limiting valve main valve plug (41) has damping hole II (42).
7. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 5, it is characterised in that: described
Pressure limiting valve chamber is connected to up and down with pressure regulator valve spring cavity coaxial line and by runner；The pressure limiting valve chamber and electromagnetism pop valve (5)
Liquid outlet II (17) are connected to by runner.
8. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 7, it is characterised in that: described
Pressure regulator valve main valve plug (21) is mounted in valve body (1), and the valve body (1) has to be matched with pressure regulator valve main valve plug (21) shape
Assembly cavity.
9. a kind of combination overflow valve with pressure regulation and pressure-limiting function according to claim 1, it is characterised in that: described
It combines overflow valve and has electromagnetism pop valve (5), the stream that electromagnetism pop valve (5) is arranged between pressure limiting valve chamber and liquid outlet II (17)
On road.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164757.7A CN109854563B (en) | 2019-03-05 | 2019-03-05 | Pressure regulating and limiting combined overflow valve |
| LU101583A LU101583B1 (en) | 2019-03-05 | 2019-12-30 | Combined overflow valve with pressure regulating and limiting functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910164757.7A CN109854563B (en) | 2019-03-05 | 2019-03-05 | Pressure regulating and limiting combined overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854563A true CN109854563A (en) | 2019-06-07 |
| CN109854563B CN109854563B (en) | 2023-08-08 |
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ID=66899735
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910164757.7A Active CN109854563B (en) | 2019-03-05 | 2019-03-05 | Pressure regulating and limiting combined overflow valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109854563B (en) |
| LU (1) | LU101583B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236622A (en) * | 2021-05-28 | 2021-08-10 | 北京天地玛珂电液控制***有限公司 | Fixed-difference overflow valve and intelligent power generation hydraulic system |
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Also Published As
| Publication number | Publication date |
|---|---|
| LU101583B1 (en) | 2020-09-18 |
| CN109854563B (en) | 2023-08-08 |
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